Spectral, Irradiance, and Temporal Aspects of Natural and Artificial Light
Spectral, Irradiance, and Temporal Aspects of Natural and Artificial Light
复制标题
自然光和人造光的光谱、辐照度和时间方面
DOI:
10.1111/j.1749-6632.1985.tb11796.x
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发表时间:
1985
影响因子:
5.2
通讯作者:
L. Thorington
中科院分区:
文献类型:
--
作者:
L. Thorington
Light is defined by some as radiant energy that is capable of exciting the retina and producing a visual sensation.' For humans this effectively defines the spectral range of light as that of the rainbow, that is, wavelengths of about 360 to 830 nanometers (nm).* The visual sensation produced by the rainbow is one of both color (hue) and brightness, but the legal and technical standards by which light is bought and sold effectively recognize only the brightness related s t imul~s .~" The standards do not recognize ultraviolet (UV) radiation, which extends to wavelengths of about 290 nm in the natural light environment. Nor is there any specification for time in relation to light, the transition between on and off phases of light, or the periodicity of light exposure. The fact that radiation of all wavelengths from 290 nm to 830 nm, as well as its time variations, can have medical or biological effects suggests the need for a review of the differences between natural light and artificial light under which most people in industralized countries are working today. Accordingly, in this paper basic data are presented, and/or referenced, for natural and artificial light of wavelength 290-830 nm from which other related radiometric, photometric, colorimetric, chronometric, and biometric data of interest can be derived. Examples of these are given and discussed in the context of existing standards and laws defining light and limiting energy consumption for generating it.